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![Thread Creation Example
public class Threadlearning extends Thread
{
public void run()
{
System.out.println("i am thread ");
}
public static void main(String[] args)
{
Threadlearning t = new Threadlearning();
t.start();
}
}
public class Thread2way implements
Runnable
{
public void run()
{
System.out.println("i am in thread");
}
public static void main(String args[])
{
(new Thread(new Thread2way())).start();
}
}](https://image.slidesharecdn.com/threads-140701221041-phpapp01/75/Threads-concept-in-java-10-2048.jpg)
Uploaded byMuthukumaran Subramanian
Threads concept in java
The document outlines multithreading as a technique allowing multiple processors to execute a set of code by sharing threads within a process, which are lightweight units of execution. It differentiates between processes and threads, explaining that processes have their own memory space while threads share a common memory. Additionally, it describes the life cycle of a thread, methods for its creation, and important thread management functions.
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Threads concept in java
- 1. Multithreading ● A techniqueby which a single set of code can be used by several processors at different stages of execution.
- 2. Process and Threads ●A process is a thread in execution. ● A process may be divided ninto number of independent units known as threads. ● A thread is a dispatchable unit of work. ● Threads are light-weight processes within a process . ● A process is a collection of one or more threads and associated system resources
- 3. Difference between Processand Threads ● Process can be divided into multiple threads ● Each process has its own memory space ● It is difficult to create a process ● Threads cannot be sub divided. ● Threads of the same process share a common memory space ● It is easy to create a thread.
- 4. Multitasking ● Multitasking isa method where multiple tasks are performed during the same period of time ● They are executed concurrently instead of sequentially ● The tasks share common processing resources, such as a CPU and main memory.
- 5. Difference between multitaskingand multithreading ● An ability to run several programs simultaneously potentially by using several processors or by time sharing the resources available. ● An ability to run serveral processes of a single program simultaneously potentially using several processors or by time sharing the resources available.
- 6. Life cycle ofThread
- 7. Contd' ● NEW- A threadthat is just instantiated is in new state. When a start() method is invoked, the thread moves to the ready state from which it is automatically moved to runnable state by the thread scheduler. ● RUNNABLE (ready running)-A thread executing in the JVM is in running state. ● BLOCKED - A thread that is blocked waiting for a monitor lock is in this state. This can also occur when a thread performs an I/O operation and moves to next (runnable) state. ● WAITING - A thread that is waiting indefinitely for another thread to perform a particular action is in this state. ● TIMED_WAITING - A thread that is waiting for another thread to perform an action for up to a specified waiting time is in this state. ● TERMINATED - A thread that has exited is in this state.
- 8. Thread Creation Threads canbe created using two ways ● By implementing the Runnable class ● By extending the Thread class ● start() method is used to start the thread ● run() method is executed after calling the start() ● run() can contain the code you wish to perform using thread.
- 9. Some of methodsused in Threads ● start()- to begin the execution of thread ● setName()- to set the name for a thread ● getName()- to get the name of a thread ● Sleep() - to make the thread wait for specified amount of time. ● setPriority()- to set the priority of the threads ● getPriority()- to get the priority of threads
- 10. Thread Creation Example publicclass Threadlearning extends Thread { public void run() { System.out.println("i am thread "); } public static void main(String[] args) { Threadlearning t = new Threadlearning(); t.start(); } } public class Thread2way implements Runnable { public void run() { System.out.println("i am in thread"); } public static void main(String args[]) { (new Thread(new Thread2way())).start(); } }